Like described in image, I do not know how P1 become like that. Especially about why p1 is removed. Is there any formula used for this question?
2026-03-24 23:51:12.1774396272
I do not understand substitution
37 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail At
1
The equation is of the form
$$P_1=a+bP_1$$ which you rewrite
$$(1-b)P_1=a,$$ $$P_1=\frac a{1-b}.$$